java - Create Database -

i have small progam in java page create database application.here code.database @ mysql.but not work me.i think code correct.

private databasesource dbsource = new databasesourceimpl(); private connection connection = null; private statement statement = null; private preparedstatement preparedstatement = null; private resultset resultset = null;   /** creates new form loginscreen */ public loginscreen() {     initcomponents();     container c =this.getcontentpane();     c.setbackground(color.white);      connection = (connection) dbsource.getconnection();      signinbtn.addactionlistener(new actionlistener() {          public void actionperformed(actionevent e) {             string uname = usrnametxt.gettext();             char[] pword = pwordtxt.getpassword();             string password = new string(pword);              if(uname.equals("")&& password.equals("")){               util.showerrormessagedialog("please fill fields.");               }else{                  if(uname.equals("") || uname.equals(" ")&& ! password.equals("")){                    util.showerrormessagedialog("login id left blank");              }else{                  if (password.equals("") || password.equals(" ")&& uname.equals("")) {                  util.showerrormessagedialog("password left blank.");                  }else{                  authenticatelogin();                  }              }               }         }     }); } public void authenticatelogin() {     try {         preparedstatement = (preparedstatement) connection.preparestatement("create database if not exist macfast");         preparedstatement.executequery();      } catch (sqlexception ex) {         logger.getlogger(loginscreen.class.getname()).log(level.severe, null, ex);     }   }  public static void main(string args[]) {     java.awt.eventqueue.invokelater(new runnable() {         public void run() {             new loginscreen().setvisible(true);          }     }); }  // variables declaration - not modify                      private javax.swing.jlabel jlabel1; private javax.swing.jlabel jlabel2; private javax.swing.jlabel jlabel3; private javax.swing.jlabel jlabel6; private javax.swing.jlabel jlabel7; private javax.swing.jpanel jpanel2; private javax.swing.jpasswordfield pwordtxt; private javax.swing.jbutton signinbtn; private javax.swing.jtextfield usrnametxt; // end of variables declaration                     } 

this code example.but not create database named macfast... shown in above example. happened program. 1 please me

you need use executeupdate instead of executequery.

statement st = connection.createstatement(); st.executeupdate("create database if not exists macfast"); st.close();